Hello,
I have (2) machines connected to each other with Mellanox Connectx-2 Ethernet cards. They are connected via 10m passive twinax cable (I need this length to reach from my office on the ground floor to my server in the basement). The basement server is running Ubuntu 14.04.4 Server on an i5-4590 with 32GB of Ram and the office workstation is running Windows 10 64-bit Professional on an e5-2670 v1 with 64GB of RAM. Here's a few tests with iperf3 between the two machines (I tried turning the Windows firewall off temporarily to see if that helped, but no difference).
As, you can see it is SLOW (the bottom picture is the best it's performed, sometimes it's in the single digit MB/s). If I don't use iperf and instead just use Samba to pull a big iso from my server, over the gigabit connection it's flat and completely saturated vs. the 10GBe only going about getting about 35MB/s and being very sporadic.
I'm new to this, so I'm leaning towards this being the fault of the LONG passive SFP+ cable, so please let me know how I should troubleshoot this, or what I should replace the cable with (is an active cable enough or do I need to try fiber, if so, what do I buy?)
Thanks!
I have (2) machines connected to each other with Mellanox Connectx-2 Ethernet cards. They are connected via 10m passive twinax cable (I need this length to reach from my office on the ground floor to my server in the basement). The basement server is running Ubuntu 14.04.4 Server on an i5-4590 with 32GB of Ram and the office workstation is running Windows 10 64-bit Professional on an e5-2670 v1 with 64GB of RAM. Here's a few tests with iperf3 between the two machines (I tried turning the Windows firewall off temporarily to see if that helped, but no difference).
As, you can see it is SLOW (the bottom picture is the best it's performed, sometimes it's in the single digit MB/s). If I don't use iperf and instead just use Samba to pull a big iso from my server, over the gigabit connection it's flat and completely saturated vs. the 10GBe only going about getting about 35MB/s and being very sporadic.
I'm new to this, so I'm leaning towards this being the fault of the LONG passive SFP+ cable, so please let me know how I should troubleshoot this, or what I should replace the cable with (is an active cable enough or do I need to try fiber, if so, what do I buy?)
Thanks!